#include <iostream>
#include <unistd.h>
#include <string>
#include <mysql/mysql.h>

// const std::string host = "127.0.0.1";
const std::string host = "localhost";
const std::string user = "syz";
const std::string passwd = "SYZ20020429";
const std::string db = "conn";
const unsigned int port = 8080;

int main()
{
    // std::cout << "mysql client version: " << mysql_get_client_info() << std::endl;

    MYSQL *my = mysql_init(nullptr);
    if (my == nullptr)
    {
        std::cerr << "init MySQL error" << std::endl;
        return 1;
    }

    if (mysql_real_connect(my, host.c_str(), user.c_str(), passwd.c_str(), db.c_str(), port, nullptr, 0) == nullptr)
    {
        std::cerr << "connection MySQL error" << std::endl;
        return 2;
    }
    mysql_set_character_set(my, "utf8");

    // std::string sql = "update user set age=33 where id=2";
    // std::string sql = "insert into user(name,age,tel) values('jerry',44,'11111')";
    // std::string sql = "delete from user where id=1";
    // std::string sql = "insert into user(name,age,tel) values('和光同尘',22,'13366379')";
    std::string sql = "select * from user";
    int n = mysql_query(my, sql.c_str());
    if (n == 0)
    {
        std::cout << sql << " success: " << n << std::endl;
    }
    else
    {
        std::cerr << sql << " failed: " << n << std::endl;
        return 3;
    }

    MYSQL_RES *res = mysql_store_result(my);
    if (res == nullptr)
    {
        std::cerr << "mysql_store_result error" << std::endl;
        return 4;
    }

    int rows = mysql_num_rows(res);
    int fields = mysql_num_fields(res);
    std::cout << "行: " << rows << std::endl;
    std::cout << "列: " << fields << std::endl;

    // 属性
    MYSQL_FIELD *field_array = mysql_fetch_fields(res);
    for (int i = 0; i < fields; i++)
    {
        std::cout << field_array[i].name << '\t';
    }
    std::cout << '\n';

    // 内容
    for (int i = 0; i < rows; i++)
    {
        MYSQL_ROW row = mysql_fetch_row(res);
        for (int j = 0; j < fields; j++)
        {
            std::cout << row[j] << '\t';
        }
        std::cout << '\n';
    }
    std::cout << field_array[0].db << ' ' << field_array[0].table << std::endl;

    // std::cout << "connect success" << std::endl;

    // std::string sql;
    // while (true)
    // {
    //     std::cout << ">>>";
    //     if (!std::getline(std::cin, sql) || sql == "quit")
    //     {
    //         std::cout << "Bye" << std::endl;
    //         break;
    //     }
    //     int n = mysql_query(my, sql.c_str());
    //     if (n == 0)
    //         std::cout << sql << "success: " << n << std::endl;
    //     else
    //         std::cerr << sql << "failed: " << n << std::endl;
    // }

    mysql_free_result(res);
    mysql_close(my);
    return 0;
}